Electric-arc light for magic lanterns



(No Model) I G. BESELER. ELECTRIC ARC LIGHT FOR MAGIC LANTERNS. No.521,362.

Patented June 12, 1894.

l/VVENIOH A TTOHNE YS.

UNITED STATES PATENT OFFICE.

CHARLES BESELER, OF JERSEY CITY, NEW JERSEY.

ELECTRIC-ARC LIGHT FOR MAGIC LANTERNS.

SPECIFICATION forming part of Letters Patent No. 521,362, dated June 12,1894.

Application filed March I6, 1894 Serial No. 503,865. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES BESELER, of Jersey City, in the county ofvHudson and State of New Jersey, have invented a new and ImprovedElectric-Arc Light for Magic Lanterns, of which the following is a full,clear, and exact description.

The object of the invention is to provide a new and improved electricarc lightfor magic lanterns, which is simple and durable inconstruction, and arranged in such a manner as to enable the operator toconveniently and accurately adjust the light relative to the condenserof the magic lantern, to produce the best results on the screen.

The invention consists of certain parts and details, and combinations ofthe same, as will be hereinafter described and then pointed out in theclaims.

Reference is to be had to the accompanying drawings, forming apart ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figurel is a side elevation of the improvement as applied. Fig. 2 is anenlarged side elevation of the improvement. Fig. 3 is an enlarged endelevation of the raising and lowering device for the casing. Fig. 4 is asectional side elevation of the same. Fig. 5 is an enlarged sectionalside elevation of the adjusting device for the upper carbon; and Fig. 6is a plan View of part of the casing.

The magic lantern A of any approved construction, is mounted in theusual manner on the standards B erected on a base 0, and the saidstandards support rearwardly extending guide rods D on which are fittedto slide the cross heads E, connected with each other by the usual crossbar E, as plainly shown in Fig. 3. The cross heads E support posts E onwhich are fitted to slide vertically the sleeves F connected with eachother by a cross bar F on which is pivoted the are light casing Fcontaining the usual compensating mechanism for the carbons, thesaidoasing being also provided with binding posts for making thenecessary connection with the conducting wires for the electricity. Thecompensating mechanism is provided with the usual rack G mounted toslide in the easing F and carrying at its upper end a tube H, in whichis fitted to slide longitudinally a rod I, by means of a screw rod Hmounted to rotate in the said tube H and screwing in the inner end ofthe said rod I. The outer end of the rod I is provided with a clamp Ifor the upper carbon J, and the said rod is prevented from turning byapin I projecting from the rod, and engaging a longitudinallyextendingslot H formed in the tube H, as plainly illustrated in Fig. 5. V

In alignment with the upper carbon J is the lower carbon J held in asocket K by means of said screws K, the said socket being provided withan arm K mounted to swing loosely on a stud K projecting downwardly fromthe front end of the casing F, as plainly shown in Figs. 1 and 2. g

In order to raise and lower the casingF on the posts E I provide a bellcrank lever L havingthe front end of its arm L curved and forked toengage the under side of the cross' piece F carrying the casing F, aspreviously described. The bell crank lever L is fulcrumed at L on aprojection E supported by arms E from the cross heads E, and in the saidprojection E screws a screw rod N engaging the other arm L of the bellcrank lever L, see Fig. 4. Now, it will be seen that by turning thescrew rod N in one direction it screws inward and presses on the arm Lof the bell crank lever, so as to swing the latter upward in thedirection of the arrow a whereby the other arm L on account of engagingthe cross piece F of the casing F causes the latter to slide upward onthe standards E By turning the screw rod N in the opposite direction orrearward, the bell crank lever L will swing downward in the inversedirection of the arrow at, by the weightof the casing F then sliding onthe posts E The casing F, as previously mentioned, is pivoted on thecross piece F and on the said casing near one rear corner is formed aprojecting lip F (see Fig. 6) having a segmental slot F the center ofwhich is the pivot connecting the casing F with the cross piece FThrough this segmental slot F passes a set screw 0 screwing in aprojection F forming part of the cross piece F so that by screwing upthe set screw the lip F is clamped to the projection F so that thecasing F cannot turn on its pivot on the cross piece F By unscrewing theset screw the casingF may be swung to the right or left, so that thecontacting point of the carbons J, J is brought into a central positionrelative to the condenser A' of the magic lantern A. On the front end ofthe casing F is held a shield P made of asbestus or other suitablematerial so as to shield the casing F and also form a sort of reflectorfor the are light produced between the carbons J, J, directly in frontof the said shield.

It will be seen that by the arrangement described, the casing F may bereadily raised or lowered and turned sidewise, so as to bring thecontacting point of the carbons J and J into the proper central positionrelative to the center of the condenser A. It will also be seen that theupper carbon J can be 1ongitudinally adjusted so as to hold it in properrelative relation to the lower carbon J fixed in the socket K, as thelatter being mounted on the arm K swinging from the stud K enables theoperator to adjust the said carbon J relative to the center of thecondenser A whenever necessary.

By having the entire are light arranged in such a manner that it can belongitudinally adjusted on the rods D, the contact point between thecarbons J,J, can be moved nearer to or farther from the condenser A, asthe case may require.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. An electric are light for magic lanterns,comprising a casing mounted to slide vertically and supporting thecarbons, a bell crank lever engaging with one arm the said casin g,

and means for imparting a swinging motion to the said bell crank leverto raise or lower comprising longitudinallyadjustable posts,

connected sleeves fitted to slide on the said posts, a casing pivoted onthe cross bar connecting the said sleeves with each other, a

bell crank lever engaging the said cross bar,

and a screw rod engaging the said bell crank lever to raise or lower thesaid casing, substantially as shown and described.

3. An electric are light for magic lanterns, comprising sleeves fittedto slide vertically, a cross bar for connecting the sleeves with eachother, a casing pivoted on the said cross bar and provided with a liphaving a slot, and a set screw screwing in a projection from the saidcross bar and engaging the said slot in the lip, substantially as shownand described.

4. An electric are light for magic lanterns,- provided with a carboncarrier, comprisinga tube supported on a rack,a rod fitted to slide inthe said tube and provided with a clamp for the carbon, and a screw rodturning in the said tube and screwing in the said rod, substantially asshown and described.

5. An electric are light for magic lanterns, provided with a carboncarrier, comprising a tube supported on a rack, a rod fitted to slide inthe said tube and provided with a clamp for the carbon, a screw rodturning in the said tube and screwing in the said rod, and a pinprojecting from the said rod and engaging a longitudinal slot in thesaid tube to prevent the rod from turning,substantially as shown anddescribed.

CHARLES BESELER.

